LS95C4D-T Equivalent & Substitute Parts

Part Overview

The LS95C4D-T is a tactile switch manufactured by Citizen, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.02A at 12VDC. This surface mount component features top actuation with a 0.55mm actuator height and 0.12mm switch travel. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing design support, maintenance, and production continuity. The LS95C4D-T operates with 240gf operating force and supports 500,000 mechanical cycles, with RoHS compliance and MSL Level 1 rating.

Substiute Parts

LS95C4D-T

CitizenIn Stock: 7103LS95C4D-T Datasheet

Current PartRFQ

EVP-BB4A9B000

Panasonic Electronic ComponentsIn Stock: 10017EVP-BB4A9B000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LS95C4D-T is determined by strict alignment of the following critical parameters:

Circuit and Function Compatibility: The substitute must maintain SPST-NO circuit configuration with Off-Mom (momentary) switch function to ensure electrical behavior equivalence.

Contact Rating: The substitute contact rating must equal or exceed 0.02A. The EVP-BB4A9B000 is rated at 0.02A @ 15VDC, which exceeds the original 12VDC specification, providing enhanced voltage margin while maintaining the same current capacity.

Mechanical Characteristics: Operating force (240gf), mechanical life (500,000 cycles), and switch travel (0.12mm for LS95C4D-T; 0.11mm for EVP-BB4A9B000) must be within acceptable tolerance for the application. Both parts operate at identical force levels and cycle ratings.

Mounting and Orientation: Both parts are surface mount with top actuation, ensuring PCB layout compatibility. Actuator height differs slightly (0.55mm vs. 0.53mm), which is within typical assembly tolerances for surface mount applications.

Outline Dimensions: The LS95C4D-T measures 2.80mm x 1.75mm while the EVP-BB4A9B000 measures 2.60mm x 1.60mm. These dimensional differences require footprint verification during PCB redesign.

Regulatory Compliance: Both parts are RoHS compliant, REACH unaffected, and carry MSL Level 1 rating, ensuring environmental and handling compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The LS95C4D-T is obsolete, necessitating substitution for new production or long-term support. The EVP-BB4A9B000 is actively manufactured by Panasonic, ensuring ongoing availability and supply chain stability.

Electrical Equivalence: Both parts maintain identical SPST-NO circuit configuration, momentary function, and 0.02A current rating. The EVP-BB4A9B000 operates at 15VDC versus the original 12VDC specification, providing a 3VDC margin that is acceptable for most low-voltage applications without circuit modification.

Mechanical Compatibility: Operating force (240gf) and mechanical life (500,000 cycles) are identical between parts. Switch travel differs by 0.01mm (0.12mm vs. 0.11mm), which is negligible for tactile switch applications. Actuator height difference of 0.02mm is within standard surface mount assembly tolerances.

Physical Footprint: The EVP-BB4A9B000 has a smaller outline (2.60mm x 1.60mm vs. 2.80mm x 1.75mm). PCB footprint redesign is required; however, the reduced size may provide layout benefits. Termination style differs (Gull Wing vs. SMD Tab), requiring assembly process evaluation.

Regulatory and Environmental Compliance: Both parts meet RoHS requirements, are REACH unaffected, and carry MSL Level 1 rating. The EVP-BB4A9B000 meets ROHS3 (latest standard) and provides IP67 ingress protection with defined operating temperature range (-40°C ~ 85°C), offering enhanced environmental specifications.

Recommendation: The EVP-BB4A9B000 is a suitable substitute for the obsolete LS95C4D-T. Verification of PCB footprint compatibility and assembly process capability for Gull Wing termination is required before implementation.

Frequently Asked Questions (FAQ)

Q: Can the EVP-BB4A9B000 directly replace the LS95C4D-T without PCB modification?

A: No. While electrical and mechanical parameters are compatible, the outline dimensions differ (2.60mm x 1.60mm vs. 2.80mm x 1.75mm) and termination style changes from SMD Tab to Gull Wing. PCB footprint redesign and assembly process verification are required.

Q: Is the higher voltage rating (15VDC vs. 12VDC) of the EVP-BB4A9B000 acceptable?

A: Yes. The substitute's 15VDC rating exceeds the original 12VDC specification, providing a 3VDC safety margin. This is standard practice in component substitution and does not require circuit modification for applications operating at or below 12VDC.

Q: What is the impact of the different termination styles?

A: The LS95C4D-T uses SMD Tab termination while the EVP-BB4A9B000 uses Gull Wing termination. This affects solder joint geometry and reflow profile requirements. Assembly equipment and process parameters must be evaluated for compatibility with Gull Wing leads.

Q: Are the mechanical characteristics equivalent?

A: Yes. Both parts operate at 240gf force with 500,000 mechanical cycle life. Switch travel differs by 0.01mm (0.12mm vs. 0.11mm) and actuator height by 0.02mm (0.55mm vs. 0.53mm), both within acceptable tolerances for tactile switch applications.

Q: Does the smaller footprint of the EVP-BB4A9B000 provide any advantages?

A: Yes. The reduced outline (2.60mm x 1.60mm) may enable more compact PCB layouts. However, this requires intentional footprint redesign and cannot be used as a drop-in replacement on existing boards designed for the larger LS95C4D-T footprint.

Q: What is the significance of IP67 rating on the substitute part?

A: The EVP-BB4A9B000 provides IP67 ingress protection (dust tight, waterproof), while the LS95C4D-T does not specify ingress protection. This enhanced specification is beneficial for applications requiring environmental sealing but does not affect compatibility with standard indoor applications.

Q: Are both parts RoHS compliant?

A: Yes. The LS95C4D-T is RoHS compliant and the EVP-BB4A9B000 is ROHS3 compliant (latest standard). Both meet environmental regulations and are suitable for regulated markets.

Q: What is the packaging format of the substitute?

A: The EVP-BB4A9B000 is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly. The original LS95C4D-T packaging format is not specified in available documentation.

Q: Is design validation required before implementing this substitute?

A: Yes. PCB footprint verification, assembly process qualification for Gull Wing termination, and functional testing under application-specific conditions are recommended before production implementation.